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FerMonster Carboy - 7 gal. With Spigot
Accessories for your Fermonster
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The Ported Fermonster is a brand new fermenter designed specifically for fermentation. MoreBeer! gave product feedback for over 2 years of development and we think they nailed the design. The large lid allows for easy filling and makes hop or oak additions a breeze. The smooth sides are fantastic for sanitization - no ribs or texture to collect yeast or bacteria.  The large 7 gallon size was designed to provide ample space for fermentation and you'll find the molded in volume markers super handy for accurate filling. The punted bottom allows sediment to collect to the sides so that you can siphon liquid from the center.  Because they are made from vigin PET plastic they nearly unbreakable and a lot safer than similar glass carboys. Also notice the conical top which reduces surface area if you plan to store beer or wine long term.  

These ported versions come with our plastic spigot (FE347), allowing for easy racking and sampling!

Made from heavy PET plastic, the same material used in 2 L soda bottles, which is nearly impermeable to oxygen penetration.  Due to the thicknes of the material and the overall geometry the Fermonster does not require ribs or dimples for stability.  That results in a super smooth interior surface that reduces yeast and sediment buildup making it the easiest to clean, most sanitary PET carboy on the market.  The huge 4" opening makes filling a breeze, and cleanup is as easy as wiping down the inside.  The 7 gallon volume is a monster of a fermenter, reducing blowoff issues seen with standard 5 and 6 gallon carboys. Fermonsters are easily moved by hand or consider using our Carboy Carrier for even greater ease of use.

These fermentors are completely air-tight and the lids sealed tight with an O-Ring.  Additional O-Rings and Lids both with and without holes are available for purchase, see our You Might Also Need items below.


  • 4" wide mouth carboy - easy to clean!
  • Ported version includes Spigot for easy racking
  • Food grade PET plastic construction is nearly impermeable to oxygen penetration
  • No hard to clean dimples or ribs
  • Volume Markers at 5, 6, and 7 Gallons
  • Punted bottom
  • O-Ring and Lid with one hole is included (Fits #10 Stopper)
  • Additional O-Rings and Lids available
  • Weight: 1.5 lbs
  • Temperature Limit: 140° F
  • Height: 20.9 inches
  • Diameter: 11.3 inches
  • Completely taste and odor free
  • Perfect for Beer, Wine, Cider, Mead, Kombucha or any other fermented beverage!
Item # FE257
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 2LBS
Community Q&A

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Browse 2 questions Browse 2 questions and 48 answers
Why did you choose this?
MoreFlavor Store
busted my old big mouth bubbler, this fermentor is much better
Daniel B on Jun 12, 2018
Looking for a lighter fermentor than glass.
C E K on May 31, 2018
busted my old big mouth bubbler, this fermentor is much better
Daniel B on Jun 12, 2018
Needed a new primary and secondary w/ spigot
Curtis C on Jun 2, 2018
Looking for a lighter fermentor than glass.
C E K on May 31, 2018
I've had enough with narrow mouth carboys. I will never again spend over an hour trying (and failing) to clean krausen residue off the shoulder of a narrow carboy!
Antonio A on May 24, 2018
Tired of using auto siphons
John M on May 21, 2018
Going to use with Brew Jacket
Glenn H on May 16, 2018
It's clear, light weight, easy to clean, and has a spigot.
David P on Apr 19, 2018
I own several - bang for the buck - hard to beat.
Mitchell C on Apr 18, 2018
It holds the amount I like brew and it's light, safe and easy to clean.
Varnel W on Apr 9, 2018
Already have one and love it
roy s on Apr 9, 2018
good price
Michael M on Apr 7, 2018
Wanted to try one
mark g on Apr 6, 2018
Great size
David Williams on Apr 5, 2018
These are easy to clean and the spigot is the perfect addition. I had to buy a new one because one of my old ones was getting pretty banged up after constant use for the past year.
Christopher T on Mar 30, 2018
I needed a great secondary fermentation container. This does the trick!
Patrick Manley on Mar 28, 2018
The spigot makes transfers so much easier
Michael M on Mar 26, 2018
required larger kombucha brewing vessel with simpler dispensing
Troy C on Mar 22, 2018
I have one already and it's great and easy to clean. Bought for secondary fermenter
Nick Rightmire on Mar 21, 2018
I have already need another. Like very much
Jeff O on Mar 4, 2018
Like the size and the spigot; ready to move up slightly from buckets.
Donald F on Mar 1, 2018
Have the 6 gal model that I like but need a little more space when wort slightly over 5 gal.
Phil M on Mar 1, 2018
Because the Big Mouth Bubbler sucks.
James C on Feb 24, 2018
wide mouth and spigot
Tim V on Feb 23, 2018
Ease of cleaning.
scott l on Feb 16, 2018
They are easy to clean, have a wider mouth then a class carboy and are so so so much lighter.
Seth H on Feb 15, 2018
Because I already own one and they are amazing
Ryan Olstad on Feb 15, 2018
need to step back to 5 gal better than a bucket hopefully
Timothy O on Feb 13, 2018
Needed bottle bucket,serves as both
Harold R on Feb 13, 2018
Read reviews online
Jocelyn G on Feb 8, 2018
Love the size for wine and love the design, including the spigot and the sloped bottom.
Tollie L M on Feb 8, 2018
Good reviews, spigot and small footprint.
Michael M on Feb 8, 2018
Loved mine, need more!
Daniel D on Feb 7, 2018
Need to have a backup
Henrique H on Jan 29, 2018
I needed a fermenter :)
Tim K on Jan 29, 2018
Already have one and I wanted a second one
Derek H on Jan 26, 2018
Seems to be best fermentor for the money - seals better than buckets, spicket for hydrometer testing, wide mouth lid you can drill hole in and get hand inside to clean, and it's clear so you can watch the fermentation happen (never gets old)
Blake M on Jan 25, 2018
Recommendations from Wine Making talk website to use with extended maceration wine kits
Brian G on Jan 23, 2018
Looking for replacements for my old carboys
Lars M on Jan 23, 2018
We have a number of these. They work GREAT!
Jim L on Jan 22, 2018
I like these fermenters a lot. They are not expensive, and 7 gallons gives plenty of headspace for a 5 gallon batch, The wide mouth is great for cleaning and dry hopping and the screw on lid makes a good seal. My only complaint is the hole for the airlock doesn't seem always especially round; I have to really jam the stopper in it to get a good seal there.
Mark L on Jan 22, 2018
Features, price
Brian A on Jan 19, 2018
Want to make 6 gallon batches to completely fill my keg and then bottle what is left.
Justin R D on Jan 17, 2018
Beer & hands are at risk whenever a glass carboy breaks. After breaking two in six years, I'm giving these a try & hope that they don't scratch too quickly.
Douglas I on Jan 15, 2018
Easy of use for dry hopping, I hope.
Pat L on Jan 15, 2018
I have two of these and I really love them, so I'm adding two more to double my brewing capacity
Jason L on Jan 15, 2018
Needed a new primary and secondary w/ spigot
Curtis C on Jun 2, 2018
I've had enough with narrow mouth carboys. I will never again spend over an hour trying (and failing) to clean krausen residue off the shoulder of a narrow carboy!
Antonio A on May 24, 2018
Has anyone had to use a blow off tube and if so what OD?
Michael Cundiff on Feb 25, 2018
BEST ANSWER: Hi Michael,
I've had this fermenter for over a year fermenting 5.5 and 6 gal batches. With aggressive yeast I'll attach a blow off tube. Simply insert a 1/2 OD tube into the size #10 stopper that is a recommended purchase from Morebeer. It creates an airtight fi!

4.2 / 5.0
37 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Oversized o ring/seal problems
The rubber o ring seal is too large for the cover and would not seat properly. In the process of installing the cover with an oversized o ring, the seal was cross-threaded and may have contaminated my batch of brew. Searching for a new o ring to fit and hoping my brew is salvageable.
June 13, 2018
1 month ago
Response from MoreFlavor
Hello Mark - If you go to FE257's product page on our website, we have a great short video of how to install these o-rings into the lid of the FerMonster.
June 13, 2018
Zach R Staff
Very satisfied.
Although its made of plastic, its very sturdy. No more glass carboys for me! Read about lid getting hard to unscrew. A little soap on the threads and its fine.
June 3, 2018
1 month ago
Changed my brew-life.
Man these things are SWEET. Being in my 40s, i try to find ways to save my back during brewday and these have def done that. It also precludes the need for a siphon. Carrying 2 empty carboys with one hand made me giggle like a child with a new puppy. And cleaning them was amazing. I simply used a hose and my hand to wipe off the trub. Even if i have to replace them every cpl years (which i dont expect) ... worth it!
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May 10, 2018
2 months ago
Simple elegant design
I started with this fermenter a year ago. I loved it but thought a cool stainless Anvil one would be better. It's not. These are easy to clean using normal soap and a sponge, they're obviously transparent to see how things are doing, and low cost. Sealing the lid takes some finesse and unscrewing the lid when done can be a challenge. Especially with dried on wort. Track is to invert it and get the gasket wet, then unscrew.

I have 5 of these.
May 8, 2018
2 months ago
Response from MoreFlavor
Great review!
May 9, 2018
Zach R Staff
O-ring/gasket is a bad fit.
Excellent experience purchasing through MoreBeer. Fast and easy. I bought one of these two months ago for a test run. After 2 batches I liked it so much that I bought 4 more.
Pros... I like the smooth sides, and the larger 7gal volume.
Cons... The o-ring is pretty pesky to get right so they should only be used for primary. The opening could be a little bigger. I’m somewhat muscled and can barely get my arm in deep enough to install and remove the spigot.
April 26, 2018
2 months ago
Great piece this was my second probably going to order a third
April 22, 2018
2 months ago
I can see clearly now.....
Love to have a brew and watch the yeast work. No more buckets for me.
April 7, 2018
5 months ago
Great for fermentation
Perfect size for 5-5.5 gal batches that have the potential of blow-off. Room for foaming without overflowing the airlock. Clear material so you can monitor the fermentation. And works well with wrap-around heating pads to control fermentation temperature. My only complaint is that spigot leaks slightly around threaded area. Hand-tightening inside nut doesn't seem like it is enough, but I have been hesitant to use a wrench.
March 28, 2018
3 months ago
Pluses & Minuses
First, the pluses... It's lightweight and easy to clean. Now the minuses: The walls are very thin and flex too easily. If you are moving it while fermenting, the airlock bubbles out and then gets sucked back in allowing air to enter. My other main complaint is the top is really hard to unscrew afterward even if you don't tighten it as tight as you can. I'll probably dedicate it for the transfer process when bottling.
March 21, 2018
5 months ago
MoreBeer is awesome
Second version of the fermonster I’ve bought. Works great, I’m excited to leave siphoning behind. I mainly just wanted to praise MoreBeer’s customer service. They mistakenly sent me a 5 gallon small mouth fermenter instead of this model and when I called up about it they sent me out the fermonster right away and told me I could keep the 5 gallon. Highly recommend buying from MoreBeer. With that customer service they made me a loyal customer for life.
March 16, 2018